package com.cola.web.request;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.BufferedReader;
import java.io.IOException;

@WebServlet("/req1")
public class RequestDemo1 extends HttpServlet {

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        // String getMethod()：获取请求方式
        String method = req.getMethod();
        System.out.println(method);
        // String getContextPath()：获取虚拟目录(项目访问路径)
        String contextPath = req.getContextPath();
        System.out.println(contextPath);
        // StringBuffer getRequestURL()：获取URL
        StringBuffer url = req.getRequestURL();
        System.out.println(url.toString());
        // String getRequestURI()：获取URI
        String uri = req.getRequestURI();
        System.out.println(uri);
        // String getQueryString()：获取请求参数
        String queryString = req.getQueryString();
        System.out.println(queryString);


        // 获取请求头
        String agent = req.getHeader("user-agent");
        System.out.println(agent);

    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        // 获取post 请求体：请求参数
        BufferedReader br = req.getReader();
        // 输入流会自动销毁关闭
        String line = br.readLine();
        System.out.println(line);

    }
}
